National Aperture, Inc.

Micro Precision Apertures

Product Guide
Precision apertures, targets and patterns, including round,slit, square, etc., for universal and high power applications

株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 黒沢ビル3F
電話(0471)75‑8810 FAX0(0471)75‑5669 Email: key@keystone‑intl.co.jp

Precision Apertures
National Aperture is the leading manufacturer of precision micro-apertures. Our specialty is primarily in
the 0.5µm to 1000µm range for round holes, with sizes up to 8,500µm. Slits and patterns range up to25mm square.
All aperture edges are carefully fabricated employing proprietary computerized micro-drilling, microslitting and micro-finishing techniques. All finished components are rigidly quality controlled before
shipping. Standards are traceable to NIST.
For special needs, we have provided a choice of options at an additional cost. However, the standards aslisted are suitable for most research and industrial applications.
Some typical applications of our apertures include:• Spatial filtering• High power laser light control• Microscope calibration• Gas/liquid flow control• Spectrophotometry• Fiber optics• Astronomy, etc.
Basic types:• Standard precision round apertures• Standard precision air slit apertures• High power precision round apertures• High power precision air slit apertures• Patterns on dielectric laser coatings
Typical materials:• Stainless steel• Tantalum• Beryllium copper• Titanium• Nickel• Copper• Molybdenum• Platinum• Brass• Tungsten• Gold• etc.

General Quality Standards:
Round Apertures:
Roundness: Major axis - minor axis, max.
0.5µm on holes 1-15µm
1µm on holes 20-50µm
2µm on holes 100µm and up
Finish:Optical research quality,

Slit Apertures:
Edge finish:

20µ-inch under 20µm
60µ-inch 20µm and up
Straightness: <0.5µm per mm, <2µm total(no burrs on interior of aperture)<10µ-inch, on holes up to 250µm<80µ-inch, on holes over 250µm
Certification and SEM photos available
Pinhole positioners: See MM-1 Accessories Data sheet
Delivery: 2 weeks/ standard holes
Customer satisfaction UNCONDITIONALLY GUARANTEED on all standard aper tures.
株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 電話(0471)75‑8810

1

Standard Precision ROUND Apertures“Pinholes”
Specifications:Material:
Finish:Diameter:Positional tolerance:
Thickness:

302 stainless steel, non-magnetic
Unblackened (see options)
3/8 inch (0.375 inch max) 9.53mm.
ø.006 inch (0.1524mm)
0.0005 inch (12.7µm) 3µm and up(0.5 - 2.5µm are on 0.0001 inch - 0.0002 inch foil patch on 3-6 mil backing)Catalog #1 - 0.5
1 - 1.0
1 - 2.0
1 - 3.0
1 - 5.0
1 - 7.5
1 - 101 - 15
1 - 201 - 25
1 - 301 - 35
1 - 40
1 - 50Size
0.5µm +0.3µm, -01.0µm +0.5µm, -0
2.0µm ±0.5µm
3.0µm ±0.5µm
5.0µm ±1µm
7.5µm ±1µm
10µm ±1µm
15µm ±1.5µm
20µm ±2µm
25µm ±2µm
30µm ±2µm
35µm ±2µm
40µm ±3µm
50µm ±3µm

Catalog #Size
1 - 6565µm ±3µm
1 - 7575µm ±3µm
1 - 100
100µm ±4µm
1 - 150150µm ±6µm
1 - 200
200µm ±6µm
1 - 300
300µm ±8µm
1 - 400
400µm ±10µm
1 - 500
500µm ±10µm
1 - 600
600µm ±10µm
1 - 700
700µm ±10µm
1 - 800
800µm ±10µm
1 - 900
900µm ±10µm
1 - 1000
1000µm ±10µm
1 -“size” up to 7000µm

Unlisted hole size: one time setup charge, plus price of nearest listed size.
Non-Standard substrate diameter, thickness, material or tolerances: per quote.
OPTIONS, STANDARD ROUND
B-1
Poly black, one side, ultra-high (98%) emissivity (on holes 3µm and up only)
B-2
Oxide, dull black, both sides (cannot be combined with B-1 or HS, except
as custom order) 3µm and up
HSExtra Heavy Substrate, 0.005 inch (0.127mm) thick, thinned down to 0.0005 inch
(12.7µm) Ni at center, (see drawing)M
25mm mount D= 24.95mm T= 2.54mm blackened aluminum
M-1
1 inch mount D= 0.996 inch T= 0.100 inch blackened aluminum
M-18 18mm mount D= 18mm T= 2.54mm blackened aluminumM-0.5 1/2 inch mount D= 0.496 inch T= 0.05 inch blackened aluminum
CCalibrated; actual size, ±0.5µm or 1%, 5µm and up
CT
Closer Tolerance; half of listed tolerance, 5µm and up
Stainlessor BeCu

Aperture disc
0.0005 in. Ni(12.7µm)

0.005 in.
(0.127mm)

0.025 in.
(0.635mm)
0.375 in.
(9.525mm)

HS Option

0.25 in. thru
(6.35mm)0.376 in.
(9.55mm)BlackenedAluminum

M Option

Ordering information: Example; 25µm round, black 2 sides, mounted on 25mm disc. Cat no.: 1-25+B-2+M
SEM photos: per aperture, per additional shot/angle (not to be used for calibration)2

株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 電話(0471)75‑8810

Standard Precision AIR SLIT Apertures
Specifications:
Material:
Finish:Diameter:Positional tolerance:
Thickness:

302 stainless steel, non-magnetic
Unblackened (see options)
3/8 inch (0.375 inch max) 9.53mm.
ø.006 inch (0.1524mm)
0.0005 inch (12.7 µm) except 2.5µm(2µm and under are on 0.006mm Ni foil )Catalog #2-1
2 - 2.5
2-5
2 - 102 - 252 - 502 - 100
2 - 150
2 - 200

Slit Width (W)1.0µm +0.5µm, -0.0
2.5µm ±1µm, -0.5µm
5µm ±1µm
10µm ±1µm
25µm ±2µm
50µm ±2µm
100µm ±4µm
150µm ±4µm
200µm ±4µm

L = 1mm

L = 2mm*L = 3mm
LW6µm - 35µm one time setup charge, plus price of nearest listed size.
36µm - 750µm one time setup charge, plus price of nearest listed size.
Longer lengths up to 25mm: per quote
Non-Standard substrate diameter, thickness, or material: per quote.
*Note: L = 3mm if not otherwise specified (except 2.5µm)
Unlisted slit width:

OPTIONS, STANDARD AIR SLIT
B-1
Poly black, one side, ultra-high (98%) emissivity
B-2Oxide, dull black, both sides (cannot be combined with B-1 or HS, except
as custom order) Not for 2µm slit
HSExtra Heavy Substrate, 0.005 inch (0.127mm) thick, thinned down to 0.0005 inch(12.7µm) Ni at center, (see drawing)M
25mm mount D= 24.95mm T= 2.54mm blackened aluminum
M-1
1 inch mount D= 0.996 inch T= 0.100 inch blackened aluminum
M-18 18mm mount D= 18mm T= 2.54mm blackened aluminumM-0.5 1/2 inch mount D= 0.496 inch T= 0.05 inch blackened aluminum
CCalibrated; actual size, ±1µm or 1%, 25µm and up
CT
Closer Tolerance; half of listed tolerance, 100µm and up
Stainlessor BeCu

Aperture disc
0.0005 in. Ni(12.7µm)

0.005 in.
(0.127mm)

0.025 in.
(0.635mm)
0.375 in.
(9.525mm)

HS Option

0.25 in. thru
(6.35mm)0.376 in.
(9.55mm)BlackenedAluminum

M Option

Ordering information: Example; 25µm round, black 2 sides, mounted on 25mm disc. Cat no.: 1-25+B-2+M
SEM photos: per aperture, per additional shot/angle (not to be used for calibration)

株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 電話(0471)75‑8810

3

High Power Precision Round Apertures
Specifications:
Material:
Finish:Diameter:Positional tolerance:
Thickness:

CopperGold plated one side, flat poly black(98% emissivity) on reverse side
3/8 inch (0.3755 inch max.) 9.525mm
ø.006 inch (0.1524mm)
1 mil, with 5 mil support (bi-metal)(Electroplated; no bonding material)

5µm
Catalog #3-5
3 - 103 - 153 - 253 - 503 - 100
3 - 200
3 - size

Size
5µm ±1µm
10µm ±1µm
15µm ±1.5µm
25µm ±2µm
50µm ±3µm
100µm ±4µm
200µm ±6µm
up to 7000µm

aBeCu

0.001" Cu(0.0254mm)

Au

Poly black
0.006 inch(0.1524mm)

Unlisted hole size 6µm to 1000µm:
Non-standard substrate diameter, thickness, material or special tolerances: per quote
OPTIONS, HIGH POWER ROUND
M
25mm mount D= 24.95mm T= 2.54mm blackened aluminum
M-1
1 inch mount D= 0.996 inch T= 0.100 inch blackened aluminum
M-18 18mm mount D= 18mm T= 2.54mm blackened aluminumM-0.5 1/2 inch mount D= 0.496 inch T= 0.05 inch blackened aluminum
CCalibrated; actual size, ±0.5µm or 1%, 5µm and up
CTCloser Tolerance; half of listed tolerance, 10µm and up
G2
Gold plated, both sides
Aperture disc

SEM photos:
per aperture,per additional shot/angle(not to be used for calibration or measurement)
Power resistance, examples:
0.5 - 1 megawatt/mm2,
75 nanosecond duration, 700nm
1 - 2 megawatts/mm2,
10 nanosecond duration, 700nm
Note:0.025 in.
(0.635mm)
0.25 in. thru
(6.35mm)0.376 in.
(9.55mm)

M Option

Because of the numerous power density conditions, a test on 1 milcopper in your direct operating environment is recommended.

Ordering information example:
50µm high power round, mounted on 18mm disc, close tolerance
Catalog number: 3-50+M-18+CT
株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 電話(0471)75‑8810

4Blackened
Aluminum

50µm

High Power Precision AIR SLIT Apertures
Specifications:
Material:
Finish:Diameter:Positional tolerance:
Thickness:

Catalog #4-54 - 10
4 - 154 - 254 - 504 - 100
4 - 200

CopperGold plated one side, flat poly black(98% emissivity) on reverse side.
3/8 inch (0.3755 inch max), 9.5377mm
ø.006 inch (0.1524mm)
1 mil, with 5 mil support (bi-metal)

Slit Width (W)5µm ±1µm
10µm ±1µm
15µm ±1.5µm
25µm ±2µm
50µm ±3µm
100µm ±4µm
200µm ±4µm

Length3mm
3mm
3mm
3mm
3mm
3mm
3mm

LBeCu

W
0.0254mm Cu
0.254mmor 0.8128mm

one time setup charge, plus
price of nearest listed size.
36µm - 750µm one time setup charge, plus
price of nearest listed size.
Longer lengths up to 25mm: per quote
Non-Standard substrate diameter, thickness, or material: per quote.

1.1938mm dia.
alignment
notch

OPTIONS, HIGH POWER SLIT
M
25mm mount D= 24.95mm T= 2.54mm blackened aluminum
M-1
1 inch mount D= 0.996 inch T= 0.100 inch blackened aluminum
M-18 18mm mount D= 18mm T= 2.54mm blackened aluminumM-0.5 1/2 inch mount D= 0.496 inch T= 0.05 inch blackened aluminum
CCalibrated; actual size, ±1µm or 1%, 25µm and up
CT
Closer Tolerance; half of listed tolerance, 100µm and up
G2
Gold plated, both sides
SEM photos:
per aperture,
per additional shot/angle(not to be used for calibration or measurement)

Note:

Poly black0.1524mm

Unlisted slit width:
6µm - 35µm

Power resistance, examples:
0.5 - 1 megawatt/mm2,
75 nanosecond duration, 700nm
1 - 2 megawatts/mm2,
10 nanosecond duration, 700nm

Au

Aperture disc0.025 in.
(0.635mm)
0.25 in. thru
(6.35mm)0.376 in.
(9.55mm)BlackenedAluminum

M Option

Because of the numerous power density conditions,a test on 1 mil copper in your direct operating environment is recommended.

Ordering information example:
50µm high power round, mounted on 18mm disc, close tolerance
Catalog number: 4-50+M-18+CT
株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 電話(0471)75‑8810

5Miscellaneous Custom Apertures,
Targets, Holes and Patterns

Typical materials:•Stainless steel•Brass•Copper•Beryllium copper•Gold•Nickel•Tantalum•Tungsten•Molybdenum•Titanium•Platinum•etc.

Suggested materials (unless otherwise required):For best quality and cost; 300 series stainless steel 0.001 inch (0.0254mm) thick or under.

Gas, Liquid, Material FLOW Oriented:
Leak test grade;
The emphasis normally on roundness is replaced by orifice area specification to improve cost effeciveness. To
optimize quality, materials should be kept as thin as allowable. 302 stainless steel is suggested unlessotherwise required.

Metered Flow;Same as Leak Test above

Dies (wire polymer), Jets (liquid or gas);
Up to 0.010 inch (0.254mm) diameter x 0.010 inch (0.254mm) deep

Special Micro Patterns:
Round, square, rectangular, slit, arc, hexagon, octagon, annular, etc. andcombinations of patterns or arrays

X-ray shielding, selective:
Typical materials are tantalum, tungsten and platinum

Four-Bar Patterns:
Standard on 302 stainless steel 0.0005 inch x 0.375 inch, or copper 0.001inch. Up to 5mm square; not including applicable air slit options

Up to 0.750 inch, any workable material

SEM photos:
per feature
per additional shot/angle(Not to be used for calibration or measurement.)

Quality projection samples are available at minimal or no cost.
株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 電話(0471)75‑8810

6

Reflective Apertures
Custom Air Apertures on Reflective Surfaces
to Optical Tolerances
Flatness:to 1/4 wave per inch (25.4mm), with consideration for
thickness requirements at immediate aperture area
Reflectivity:
Optical metal mirror quality
Materials:•Copper•Stavex (stainless steel)•etc.
Thickness:
as required for flatness, minimum
Coatings:•Gold•Silver•Dichroic
•SiO
•etc.
Applications:•Astronomy; ground based and space applications•Imaging•etc.

Mirror Image

Clear Patterns, Reticles, Apertureson high power dielectric laser reflector coatings
For applications requiring transparency and/or power resistance greater than achievable with opaque(metallic, etc.) surfaces this process creates patterns on dichroic reflectors with selective transparency.
Per standard high power dielectric coating, visible and near visible
Wavelength:
Pattern generation: Per customer or National Aperture, Inc. via AutoCad™
Pattern definition: <1µm (semiconductor pattern quality)
Dimensions:
Up to 6 inch (152.4mm);

Reflectivity:
Incidence:
Power resistance:
Material:
Pricing:

thickness, 0.04 inch - 0.09 inch [1.016 - 2.286(mm)]20% to 98%, based on requirement
0˚ - 90˚, per specification
2 - 8 megawatts/mm2, pulsed
Glass, fused silica, etc.
Per quoteSample Patterns

株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 電話(0471)75‑8810

7

Pinhole Positioner
MM-Series MicroMini™
M o d e l M M - 1 X Y / PA
0.63 in.
(16.00mm)
0-80 Clear
C-bore4 places

Specifications:0.376 in.
(9.55mm)

Travel: . . . . . . . . . . .0.125 inch, X and Y(3.175mm)Screw Pitch: . . . . . .80 TPI
Sensitivity: . . . . . . .0.5µm
Backlash: . . . . . . . .0
Wobble: . . . . . . . . . .0 (no ball bearings)
Thermal Stability: . .15º to 75ºC
Weight: . . . . . . . . . .8g

0.125 inch thru
(3.175mm)
0.44 in. 0.200 in.
(11.176mm) (5.080mm)

Allen socket
Split end
retainer
0.839 in.
(21.31mm)

0.05 in. (1.27mm)
0.45 in. max. (extended)(11.43mm)
Threaded

0.40 in.
(10.16mm)
Black anodized aluminum
1.03 in.
(26.16mm)

0.125 in.
(3.175mm)

0.10 in.
(2.54mm)

Detail of Pinhole Adapter
PA-1

MM-1 stage (scale 1:1)

The pinhole (aperture) positioner is a composite of the MM-1 MicroMini™ stage and the PA-1 pinhole adapter.
A similar pinhole positioner can also employ the MM-3 stage [0.5 inch(12.7mm) travel] where needed (see Stage Catalog).

Accessories
AP4-1 Adapter Plate

0.330 inch (8.382mm)
0.090 inch (2.286mm)

0.25 inch (6.35mm)
Clearance (4 places)with standard optical tables and accessories,

0.5" dia.
(12.7mm)thru

1.0 inch(25.4mm)

1.5 inch (38.1mm)
square.0.125 inch
(3.175mm)

A multi-position mounting plate to interface
or to stabilize free-standing stages.

1.0 inch(25.4mm)0-80 Tap, 8 places(2 sets of mounting holes for MM-1)

2 - 80 thread

Black anodized
aluminum

0.050 inch allen
socketSS-1 Headless Adjusting Screw
This custom designed lead screw replaces the standard thumbscrew. It provides full linear travel, while reducing the overall

Balldriver™
or std. hex key
MM-1 stagelength of the stage by 0.4 inches (10.16mm).

0.30 in.
(7.62mm)
StainlessTG-1 Thumb Grip

Tapped holeThis knurled 1/2 inch (12.7mm) diameter adjustment ring
0.5 in. (12.7mm)

provides increased sensitivity. The TG-1 can be added to theAdjusting screw
Stainless Steelstandard MM-1 adjusting screw and may alternately be used as
0.06 in.
(1.524mm)

a locking nut.

株式会社キーストンインターナショナル
227‑0042千葉県柏市逆井13‑27 電話(0471)75‑8810

8